[gnumeric] Force auto expression background to white. Fixes #641198.

[Andreas J. Guelzow <guelzow src gnome org>]

commit e4aa88b23a7805ed94d1cef8437819a88ccbf8ef
Author: Andreas J Guelzow <aguelzow pyrshep ca>
Date:   Mon Nov 28 15:35:04 2011 -0700

    Force auto expression background to white. Fixes #641198.
    
    2011-11-28  Andreas J. Guelzow <aguelzow pyrshep ca>
    
    	* src/wbc-gtk.c (wbc_gtk_create_status_area): force auto expression
    	background to white. Fixes #641198.

 ChangeLog     |    5 +++++
 src/wbc-gtk.c |    4 ++++
 2 files changed, 9 insertions(+), 0 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index d040d1d..819dac5 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,10 @@
 2011-11-28  Andreas J. Guelzow <aguelzow pyrshep ca>
 
+	* src/wbc-gtk.c (wbc_gtk_create_status_area): force auto expression
+	background to white. Fixes #641198.
+
+2011-11-28  Andreas J. Guelzow <aguelzow pyrshep ca>
+
 	* src/item-edit.c (item_edit_draw): use the attr list attached as
 	data
 
diff --git a/src/wbc-gtk.c b/src/wbc-gtk.c
index 207cf48..f3734f9 100644
--- a/src/wbc-gtk.c
+++ b/src/wbc-gtk.c
@@ -4788,6 +4788,7 @@ static void
 wbc_gtk_create_status_area (WBCGtk *wbcg)
 {
 	GtkWidget *tmp, *frame;
+	GdkRGBA const white = {1.,1.,1.,1.};
 
 	wbcg->progress_bar = gtk_progress_bar_new ();
 	gtk_progress_bar_set_text (GTK_PROGRESS_BAR (wbcg->progress_bar), " ");
@@ -4812,6 +4813,9 @@ wbc_gtk_create_status_area (WBCGtk *wbcg)
 	frame = gtk_frame_new (NULL);
 	gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
 	gtk_container_add (GTK_CONTAINER (frame), tmp);
+	gtk_widget_override_background_color (GTK_WIDGET (tmp), 
+					      GTK_STATE_FLAG_NORMAL,
+					      &white);
 
 	wbcg->status_text = tmp = gtk_statusbar_new ();
 	gtk_widget_set_size_request (tmp, go_pango_measure_string (